Breast nodules larger than 20mm need to be treated surgically. The treatment of breast nodules needs to consider the nature of breast nodules. If the breast nodule is benign tumor, within 20mm, you can choose conservative treatment and regular ultrasound follow-up. If the tumor grows slowly, the boundary is clear and smooth, and there is no tendency of malignant lesion, you can continue to follow up and observe. If the tumor is above 20mm, a more obvious lump will be touched in the breast, try to choose surgery to remove it to avoid repeated touching and enlargement or even malignant change. If the boundary of breast nodules within 20mm is unclear and even have the tendency of malignant change, surgery is needed. Minimally invasive breast McMurdo surgery can be chosen for small nodules. The size of the breast nodule does not determine whether to operate or not, but also needs to be judged according to the nature of the specific nodule.